R2AA04010FXW77E Sanyo Denki
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The Sanyo Denki R2AA04010FXW77E is part of the R SANMOTION Servo Motors series and features a 40mm flange with a middle inertia motor type. This servo motor has a rated output of 100 Watts, supply voltage of 200 Volts, and a maximum rotation speed of 6000 min-1. It uses an absolute encoder without a battery and offers single-turn and multi-turn resolution values of 131072 and 65536 respectively.
Internal Product Review
The R2AA04010FXW77E is a Sanyo Denki SANMOTION R servo motor with 100 W rated output and 3000 min⁻1 rated speed. An absolute encoder without battery and 17-bit single-turn resolution support accurate positioning with reduced service demands. Middle-inertia construction and 6000 min⁻1 maximum rotation speed make the motor a strong choice for responsive servo axis performance.
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Product Description:
The R2AA04010FXW77E is a small-frame servo motor produced by Sanyo Denki within the R SANMOTION Servo Motors series. Designed for precision positioning, the unit integrates into compact pick-and-place heads, inspection axes, and light conveyors where closed-loop speed and torque control can improve throughput. The motor converts AC drive signals into rotational motion that can be finely regulated for demanding automation tasks. Its compact form also allows installation in equipment where available mounting space is limited.
The stator windings are rated for a 200 V supply, and the electromagnetic design supports a continuous shaft output of 100 W at a nominal speed of 3000 rpm. A low electrical time constant of 0.82 ms enables rapid current rise, so commanded torque reaches the load with minimal delay. The motor has a torque constant of 0.424 N·m/Arms, allowing compatible drives to calculate load response accurately. Phase resistance measures 9.3 Ω, while rotor inertia is maintained at 0.0627 × 10⁻⁴ kg·m² to balance responsiveness with stability. Its medium-inertia classification suits machines that alternate between acceleration and steady-state operating periods.
Dynamic headroom is extended by a maximum speed of 6000 rpm, giving controllers additional velocity for rapid indexing or error recovery. Position feedback comes from a batteryless absolute encoder that supports 65,536 turns with 16-bit resolution and 131,072 single-turn counts with 17-bit resolution, eliminating the need for homing after a power loss. The motor does not include a holding brake, so mechanical clamping or drive torque must secure vertical loads during shutdown. A mechanical time constant of 0.97 ms indicates that rotor speed settles quickly when torque steps are applied. A 40 mm mounting flange simplifies integration with miniature planetary gearboxes, while the 14.8 mV/rpm voltage constant helps determine suitable back-EMF margins when selecting a compatible drive.
